Computationally-effective worst-case model of coupling between on-board antennas that takes into account diffraction by conducting hull

Computationaly Efficient Wideband Worst Case Model of Plane Electromagnetic Wave Diffraction by Conductive System Hull

“…Electromagnetic (EM) field diffraction models based on the analytical approach proposed in [1] and developed within the framework of IEMCAP program [2], [3], which are traditionally used for express analysis of EMC, provide sufficient accuracy only if the hull of the system under consideration can be represented as a set of simple geometrical shapes (cylinder, cone, plain tetragons, etc.). A generalization of the analytical approach for taking into account the diffraction by a conductive hull of arbitrary shape, based on Uniform Theory of Diffraction (UTD) [6], is valid in a wide frequency range for antenna-to-antenna coupling but is not applicable for analysis of the plane-wave diffraction. Numerical methods of computational electromagnetics (such as FEM, FDTD, MOM, GO, UTD, PO [7]- [10], as well as hybrid methods [12], [13]) used for solving the diffraction problem in framework of EMC analysis do not satisfy the requirements given above: highfrequency solutions do not have worst case behavior due to resonances, the analysis of a large set of frequencies and directions of EM wave incidence results in unacceptable computational burden.…”

Surface-Wave Coupling and Antenna Properties in Two Dimensions

“…M UTUAL coupling often occurs between antennas that share the same substrate or ground [1]- [3], and it plays an important role in many applications such as arrays, multi-in multi-out systems, or other colocated communication systems that share the same ground plane. Mutual coupling may increase the signal correlation among antennas and reduce the efficiency of multiantenna systems [4]- [7].…”